Mersen MRT1 - Time-Delay Microfuse 250 Volts 1 amps MRF series.
Mersen

MRT1

Alternate Item Number: 782001284718

UPC: 782001284718

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Minimum Qty: 5

Multiplier: 5

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Overview

The Mersen MRT1 (SKU: MRT1) is a time-delay radial lead microfuse designed for industrial and electronic circuit protection. Rated at 250V and 1A, it features a time-delay response to effectively manage transient surges without causing nuisance tripping. Constructed with a UL 94-V0 rated thermoplastic body and cap, and tin-lead plated copper alloy pins, this fuse meets stringent global standards including UL Recognized, CSA Accepted, VDE, MITI, and CE. Its radial lead design ensures compatibility with standard fuse holders and clips, making it suitable for control panels, power supplies, and automation systems. Mersen, a recognized leader in electrical protection, provides reliable performance for demanding applications.
  • Time-delay microfuse for transient surge management
  • 250V AC, 1A rating
  • Radial lead design for easy mounting
  • UL Recognized, CSA Accepted, VDE, MITI, CE approvals
  • UL 94-V0 rated thermoplastic body and cap

Specifications

Amperage Rating
1 A
Application
Electronic circuits
Brand Name
Ferraz Shawmut
Connection
Pin
Connection Type
Radial Lead
Current Rating
1 A
Interrupt Rating
0.05 kA
Material
Thermoplastic
Material
Thermoplastic, Tin-Lead Plated Copper Alloy
Mounting
Surface
Mounting Type
Radial Lead
Series
MRF
Standard
50mA to 6.3A, 250VAC - UL Recognized and CSA Accepted
Type
Micro Fuses
Voltage Rating
250 VAC
Package Dimensions (L x W x H)
0.33 IN x 0.33 IN x 0.3 IN
Package Dimensions (L x W x H)
8.382 mm x 8.382 mm x 7.62 mm
Package Weight (Imperial)
0.010 L
Package Weight (Metric)
0.005 kg
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POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.

LCC5

POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.
9F61 Size B Clips 1.6in

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Frequently Asked Questions about Mersen

What industries and applications are Mersen products used for?

Mersen products are used across diverse industrial sectors including solar power, electric vehicles, buildings/construction, industrial automation, power distribution, HVAC, elevators, telecommunications, and specialty manufacturing. Key application areas include circuit protection, surge protection, battery module protection, electrical safety systems, and power management for residential, commercial, and utility-scale installations.

What are the main product lines offered by Mersen?

Mersen offers five primary electrical power product lines: IEC and UL/CSA Fuses and Fusegear, Surge Protection, Low Voltage Disconnect Switches, Power Distribution Blocks, and Engineered Solutions. Their comprehensive range includes specialized components like high-speed fuses, modular fuse holders, surge arresters, and custom-engineered electrical protection systems for industrial and power management applications.

What are the key features of Mersen products?

Mersen products feature advanced electrical protection and power management solutions with key characteristics including finger-safe design, compact modularity, and high-performance safety features. Their product lines span electrical power components like fuses, surge protection, power distribution blocks, and specialized solutions for industrial, solar, and building applications. Critical features include UL/CSA approvals, high short-circuit current ratings, and innovative technologies like the Fuse Control™ program that minimize electrical risks and optimize system performance.

What environmental ratings do Mersen products have?

Mersen products meet rigorous environmental ratings across multiple standards, including UL 508A Type 1, 2, 3, 4, 4X, 12, and 13, CSA Type 1, 2, 3, 4, 4X, 12, and 13, and NEMA Type 1, 2, 3, 4, 4X, 12, and 13. They feature IEC 60529 IP66 protection, with enhanced UV inhibitors for outdoor weathering and operating temperatures ranging from -40°C to 130°C (-40°F to 266°F). These ratings ensure superior protection in wet, corrosive, and challenging industrial environments.

What accessories are available for Mersen products?

Mersen offers multiple accessories for their fuse blocks and systems, including safety pullers (DFC3M and DFC3LP), DIN-rail adapters (DRM), bus bars, auxiliary contacts, and specialized mounting hardware. Key accessories include the DFC3M safety puller for 1-1/2" x 13/32" midget or Class CC fuses, the DRM adapter for mounting 303 series fuse blocks on DIN-rail, and UltraSafe fuse module accessories like bus bars and auxiliary contacts that enable module interconnection and monitoring.

How are Mersen products typically installed?

Mersen products are typically installed in electrical distribution systems, control panels, and industrial automation environments using multiple mounting options. These include service entrance panel mounting, distribution panel installation, control panel DIN rail mounting, and custom engineered solutions like Fused Coordination Panelboards. Installation depends on the specific product type, such as fuses, surge protective devices, or switches, and is designed to provide electrical protection and circuit safety in various industrial and commercial applications.

What certifications and standards do Mersen products comply with?

Mersen products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Our products meet rigorous safety and performance standards for industrial applications across North America, China, Russia, and other global markets, ensuring compliance and reliability in electrical power and advanced materials solutions.

What technical support does Mersen offer?

Mersen provides comprehensive technical support through multiple channels, including technical experts located in your time zone who can assist with product selection, application guidance, and troubleshooting. Their Fuse Control™ program offers a free Fuse Inventory Audit & Analysis, and customers can access technical resources through their sales representatives and online platform ep.mersen.com.